Rock drill



J m. 11,1927. `.61 6 u H. SWARTZ ROCK DRILL Original Filed June 17, 1924 l/ PW 3 ll' :I

Patented Jan. 11, 1927.

UNITED-STATES HARRY H. SWABTZ, OF BELL, PENNSYLVANIA.

ROCK DRILL.

Application filed'June 17, 1924, Serial No. ?20,592. Renewed September 18, 1926;

of considerable stran and will bepermitted I to eXert more force on maintaining the drill in engagement with the work.

The primary feature of the invention is the provsion of a practical, simple and sturdy structurewhch is an improvement upon devices of this character heretofore used. g

Other objects and advantages of this invention will become apparent'from the following description' and drawing.

In theaccompanying drawing forming a part of the application and in which like numerals are employed to designate like parts throughout the same:

Figure 1 represents a side elevation ofthe improved device as constructed in accordance with the present invention.

Figure` 2 is an enlarged detail section taken substantially on the plane of the line 2-2 of Figure 1. t

In carrying out the invention I provide a suitably shaped and siZed base l having supporting legs 2 which may, if desired, be provided with anti-slipping calks 3. Slidabie at its lower end upon the upper side of the base is a supporting member or board In the present instance, the upper end of the board is provided with a notch forming a seat in which the body portion of a conventional pneumatic hammer H is received. With this arrangement itis obvious that by supporting a hammer on the board and holding the latter with'the knee, the drill stem' D can be more accurateiy guided and effectively maintained in engagementwith the rock R. To assist in 'maintaining the drill in engagement with the rock, I use a fiexible cableor the like 8 and attach this at one end to the hammer. The

The present invention em-' intermediate portion thereof being passed over a guide pulley 9 on the upper end of a supporting rod 10 and there being a comparatively heavy weight ll on the lower end,

of the cable for exerting a pull upon the hammer as is obvious. The rod 10 may be detachably connected to a socket or the like 12 which is secured to the upper side of that end of the base adjacent the rock.

As the method of using the improved dev'ce is undoubtedly 'obvious from the description and drawing, it is thought unnecessary to enter a more detailed description.

Having thus described the invention, what I claim is l. In a rock drill structure of the class described, a base adapted to rest on the ground, means for securely anchoring the base upon the ground, a drill support-ing member having its lower end resting slidably upon the upper side of said base' adapted to be manuaily shitted thereupon, said member being provided at its top with the seat in which the drill is adapted to be slidably received, and a rod rising from said i base, and being of a height substantially equal to said supporting member, said rod being provided at its top with a guide, and a weighted cabie adapted to be connected at one end to the driH and having its inter-V mediate portion trained over said guide.

2. In a device of the class described, a base adapted to be supported upon the ground, anti-slipping and anchoring means carried by said base,a supporting member rising vertically from the upper side of said base, the lower end of said supporting member being' detachably and slidably mounted upon said base, to permit it to be shifted thereon, the upper end of said member being provided with a notch forming a seat, in which the body oi? a drill is adapted to be slidably seated, a socket fastened to the upper side of said base opposite said supporting member, a rod connected to and 'rising from said socket, said rod being provided at its upper end with a pulley, and a cable passing over said puHey, said cable being adapted to be connected at its upper p u end to the drill, and a weight connected' to the opposite end of said cable.

In testimony whereof I aflix ny si nature.

HARRY H. 'SW TZ. 

